/*
*    Qizx/open 3.0 beta
*
* This code is the open-source version of Qizx.
* Copyright (C) 2004-2009 Axyana Software -- All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License 
*  Version 1.1 (the "License"); you may not use this file except in 
*  compliance with the License. You may obtain a copy of the License at
*  http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
*  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
*  for the specific language governing rights and limitations under the
*  License.
*
* The Initial Developer of the Original Code is Xavier Franc - Axyana Software.
*
*/
using System;
namespace System.Qizx.Api.Util
{
	
	/// <summary> Representation of a GYear value.</summary>
	[Serializable]
	public class GYear:XQDateTimeBase
	{
		public GYear(int year, int tzSign, int tzHour, int tzMinute):base(year, 1, 1, 0, 0, 0, tzSign, tzHour, tzMinute)
		{
		}
		
		public GYear(XQDateTimeBase dt):this(dt.year, dt.tzSign, dt.tzHour, dt.tzMinute)
		{
		}
		
		public override XQDateTimeBase Parse(string that)
		{
			return parseGYear(that);
		}
		
		public static GYear parseGYear(string s)
		{
			int year;
			int[] tz = new int[3];
			
			int charCount = s.Length;
			if (charCount == 0)
				throw new XQDateTimeException("invalid gYear syntax", s);
			
			int pos = 0;
			bool negativeYear = false;
			if (s[pos] == '-')
			{
				negativeYear = true;
				++pos;
			}
			int tzPos = ParseTimeZone(s, pos, tz);
			if (tzPos < pos + 4)
				throw new XQDateTimeException("invalid gYear syntax", s);
			year = ParseInt(s, pos, tzPos);
			if (year < 10000 && tzPos - pos > 4)
				throw new XQDateTimeException("invalid year: leading zeroes", s);
			if (negativeYear)
				year = - year;
			
			return new GYear(year, tz[0], tz[1], tz[2]);
		}
		
		public override string ToString()
		{
			System.Text.StringBuilder buffer = new System.Text.StringBuilder();
			
			if (year < 0)
			{
				buffer.Append('-');
				appendPadded(- year, 4, buffer);
			}
			else
			{
				appendPadded(year, 4, buffer);
			}
			appendTimeZone(tzSign, tzHour, tzMinute, buffer);
			
			return buffer.ToString();
		}
	}
}